Routing issue in NAT environment

Hello everyone,

We’re stuck in network issue based on NAT.

Could you judge if this is a supported NAT environment?

For all clients in Classic Network, no issue in performing the backup job.

For VPN Network,

Communication works well between CS/MA and client using NAT IP.

A client is installed by push install from CS.

8400~8403 ports are opened mutually between CS/MA and a client in VPN Network. (cvping)

We can browse the content on a client in VPN so can create a new subclient.

CS/MA use the IP address 100.67.1.93  as a client IP instead of 10.67.1.93 for connection.

A client in VPN uses IP address 169.254.84.181/180 as CS/MA IP instead of 10.x.x.x.

This is an extraordinary network configuration.

But backup job is not working well. 

It showed this error message once we performed backup job in person.

I’m not sure if this config is supported or not.

Could you give me any advice?

Thanks.